Adjustments to print blanket bias voltage

A method of controlling voltage applied to a print blanket within a printing device, comprising:

• during printing of a print job, receiving an interrupt to trigger a null cycle;
• in response to the interrupt, reducing a print blanket bias voltage from a print bias level to a null bias level;
• stopping the printing during the null cycle;
• and
• in response to detecting that the interrupt has stopped, changing the print blanket bias voltage from the null bias level back to the print bias level.

A printing device comprising:

• a print blanket to receive an ink image from a photoreceptor;
• a bias unit to set a bias voltage of the print blanket;
• a voltage source to provide a print bias voltage and a null cycle bias voltage;
• and
• a controller to:
• detect an interrupt for a print job being printed by the printing device;
• responsive to the interrupt, adjust a set-point of the bias unit from the print bias voltage to the null cycle bias voltage;
• and
• responsive to detecting that the interrupt has stopped, adjust the set-point of the bias unit back to the print bias voltage.

A non-transitory machine-readable storage medium storing instructions that when executed by a processor of a printing device, cause the printing device to:

• during a print cycle of a printing process, detect an interrupt from a printing subsystem;
• in response to detecting the interrupt,
• direct a bias unit to change a print blanket bias voltage from a print bias level to a null bias level;
• and
• insert a first null cycle into the printing process following the print cycle, wherein printing stops during the first null cycle;
• and
• maintain the print blanket bias voltage at the null bias level during the first null cycle.